16-bit TIFF photos with previous shadow detail lost the detail in the latest update

[tobyphotog]

I work with analog film photographs quite a bit and am running into a problem with some high-res scans I have. It might be a computer issue, but I can't be sure. Essentially, I work with 16-bit TIFF files with a wide gammut range to include black details and white details.

With the latest version of Lightroom Classic, where I had some detail in my blacks in those photos from previous edits, and I was even doing some touch-up and color enhancements on those spots, are now blocking up as if they were jpegs with clipping blacks (a pale pasty gray with no texture). I looked inside my Lightroom preferences and confirmed I was still editing in 16-bit Prophoto RGB as my colorspace and resolution. I'm not sure how to fix this but thought I would put it out there. [Granted, I am on an older device - MacOS Monterey 2015 Macbook Pro with 16gb of ram using the i7 processor.]

One thing I did as a temporary solution. I switched versions back to 12.3 and re-imported the images and they seemed to keep their detail ok, but yeah, never experienced anything like this before!

[GoldingD]

Wonder if process v 6 vs v 5 is the issue

[tobyphotog]

Yeah great question!

[Earth Oliver]

you can change the process version in the Calibration tab. This will load the previous engine and allow you to compare.

[Rikk Flohr: Photography]

Another interesting item to know would be: Does Camera Raw 15.4 show the same problem?

[tobyphotog]

I'll give that a try because I wonder that too 👍

[johnrellis]

We can see if this is occurring in other LR installations. Select one of the problem TIFFs, do Metadata > Save Metatadata To File, upload it to Dropbox, Google Drive, or similar, and post the sharing link here.  Also post a full-resolution screenshot of what it looks like in LR 12.3 Develop on your computer.